Sheet metal lagging tool



July 31, 1945.

A. OSBORNE SHEET METAL LAGGING TOOL 2 Sheets-Sheet 1 Filed Jan. 17, 1944 Inz/ en tor A L FEED @S OQM V a Attorneys A OSBORNE I SHEET METAL LAGG'ING TOOL Filed Jan 17, 1944 2 Sheets-Sheet 2 AZ4 F24? @5502;

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is Q g Patented July 31, 1945 UNITED STATES PATENT OFFICE 2,380,781 SHEET METAL Incense TOOL Alfred Osborne, Pittsburgh, Pa. I Application January 17, 1944, Serial No. 518,627

3 Claims.

This invention relates to an especially constructed and novel tool particularly useful in handling an'embracing flexible chain such as is adapted to be wrapped around pipe insulation to.

hold the insulation or equivalent covering material in. place while screwing or bolting sheet metal jackets or lagging material in place.

As implied by way of the preceding introducin a disk-like head I. The marginal portion of this head is provided with circumferentially spaced notches 8 constituting keeper seats. The plate 6 is provided with alternate lugs 9 and ill to accommodate the length of the flexible binding chain ll. .One end of the chain is detachably connected with an anchoring hook l2 and the opposite. end of the chain is wound about a reeling drum l3 and fastened in an anchoring notch H in the-marginal portion of the disk-like head l5 forming an internal part of the drum. As brought out to advantage in Figure 3, the drum is mounted'for idling rotation on a bolt l6' mounted in the upright I. This bolt serves as an axle and there is-an assembling and retaining nut I! on the threaded end held in place against accidentaldisplacementby a cotter-key It. In

werlng'therequ'irements of the trade and the user, v

I have, aiter'careiul study and thought, provided special adapter means such as serves to accommodate the binding chain and also functions as a supporting base for the lever-equipped chainwinding drum and keeper means for the lever.

A structure devised in accordance with the principles of this invention seems both appropriate and aptly fitted for the purposes intended and otherwise suitable in that it is comparatively away to disclose certain otherwise hidden details. said view disclosing a fragmentary portion oi.

the pipe, pipe covering and the chain and chain winding and binding tool.

Figure 2 is an edge elevation of the tool per se with the chain omitted.

Figure 3 is a central vertical sectional view through said tool.

Figure 4 is arear elevational .view, that is, a view observing the assemblage seen in in a direction from right to left.

The adapter device, this being the main support for the tool, is denoted by the'numeral 5.

This is characterized by an arcuate central or main base. plate 8 having'an upright terminating Figure 2 addition to the chain anchoring and retaining head IS the drum is also provided with an operating lever l9, This lever is formed integral with the drum and rides in contact with the upright I and, like the drum, is rotatable on the axle IS. The lever is of any appropriate length and design. on its rear side it is provided with strap. retainers 20 for a sliding detent or latch 2|. The latch is provided with a stop shoulder 22 and is also provided with a handle 23. The reduced keeper finger 24 (see Figures 3 and 4) on the lower end of the latch is adapted to be selectively engaged with the keeper notches or seats 8. 4

In practice, I have found it desirable to provide extra arcuate plates or flaps 25, these being hingedly connected as at 28 to opposite ends ot the main adapter plate 8. Y

In operation one end of the chain I! is connected with the anchoring hook l2 on the plate 8. The chain is then wrapped around the insulation covering A embracing the pipe B. Then with the device in place as shown in Figure 1, the free end of the chain is wound partly over the drum l3 and anchored in the retention notch l4. By

'partly rotating the drum andwinding the chain thereon, the chain is made taut and binds thecovering 'A on the pipe B. The latch 2! is engaged with the desired keeper notch to hold the which the invention relates will be able toobtain a clear understanding of the invention after conslderlngthe description in connection with the notches constituting keeper seats, an axle carried centrally by said head, a chain drum mounted on said axle, said drum including a notched head and lever, and a latch on said lever engageable with said keeper seats.

2. In a metal lagging tool of the class described, a longitudinally bowed adapter plate provided with a right angular-1y disposed support, said support including a disk-like head and said head having marginal notches constituting keeper seats, arcuate leaves hingedly connected to the opposite ends oi. said adapterplate, a chain hook on one end 01' said adapter plate, a chain guide lock on the opposite end of the plate, an axle carried centrally by said head, a chain 'drum mounted on-said axle, said drum including a notched head and a lever, and a latch on said lever engageable selectively with keeper seats.

3. A metal'lag in tool 01' .the class described comprising a'longitudinally bowed adapter plate provided with a right angularly disposed part including a disk-like head having marginal notches, said head being provided centrally with an outstanding axle, a chain accommodating and winding drum mounted for rotation on said axle, said drum having a lever in sweeping movable contact with the adiacent inner surface of the said head, the upper end of the lever extending beyond the marginal notched portion oi the head, and a latch on said extending end portion of the lever mounted in a range for selective engagement with the notches.

ALFRED OSBORNE. 

